Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† strŏphus, i, m., = στρόφος, the bellyache, gripes, colic, Veg. 1, 43; 1, 57; App. Herb. 26 (in Cels. 2, 7; Scrib. Comp. 121, and Fest. s. v. vermina, p. 375 Müll., written as Greek.).